Dr.YuanwasborninBeijingin1930.61hegraduatedfromSouthwes...
問題詳情：Dr.YuanwasborninBeijingin1930.61hegraduatedfromSouthwestAgriculturalCollegein1953,hehasgivenhislifeto62(find)waystogrowmoreandmorerice.Asayoungman,hesawthegreatneedforincreasingthericeoutput.A...